Improvement in mining-drills



J. S. FLEMING.

. MINING-DRILL. I Nn.170,249. Patented No v.2-3,1875.

WITNESSE wbuore ZZWZ ATTORNEYS N. PETERS, PHOTO-LITHOGRAPHER.WASHINGTUN. Dv C.

JACOB S. FLEMING, OF STEUBENVILLE, OHIO.-

IMPROVEMENT IN MlNlNG-DRILLS.

Specification forming part of Letters Patent No. 170.249, dated November23, 1875; application filed April 17, 1875.

To all whom it may concern Be it known that I, J AOOB S. FLEMING, ofSteubenville, in the county of Jefferson and State of Ohio, haveinvented a new and valuable Improvement in Mining-Drills; and I dohereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawings, making a part of this specitication,and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a side view of my drill,and Fig. 2 is a plan view of the same. Fig. 3 is a longitudinalsectional view.

This invention has relation to improvements in drills for boring holesfor blasting rock in tunnels, in making excavations, or in mines.

' My invention consists in withdrawing the anger from the hole by meansof an independent device, and without reversing the motion of the auger,whereby a direct withdrawal of the same will cause the hole to beemptied of chippings, and will be thus in proper condition for theblasting-charge. It also consists in the combination of an adjustableoscillating tubular socket, adjusting tubular screw, and adrilling-shaft; and it also consists in certain devices for supportingand retaining the adjustable and oscillating socket in a rigid position,as will be hereinafter more fully set forth.

In the annexed drawings, A A designate wooden beams, which constitutethe side rails of the supporting-frame of my improved drilling-machine,and which are socketed into and rigidly attached to strong metallicmetal-covered end pieces B B. These rails are preferably of wood,because of the superior lightness of this material; but I may, if I soelect, use metal in their construction. End piece B is provided with afemale screw-threaded perforation, adapted to receive thecorrespondingly-threaded screw 0, upon which is rigidly secured ahand-wheel, D, the lower end of the said screw projecting through thesaid wheel, and being suitably pointed, as shown in Fig. 1', and theupper end piece B has through it vertical perforations, arranged at asuitable distance apart, and adapted to receive the legs of an U-shapedgrappling device, E, the

ently thereof.

ends of which project through the said end removing rod 1) and placingit in the upper or lower holes, as the case may be. This frame,consisting of rails A A and end pieces'B B, is designed to be securedacross or vertical to the length of a shaft, and this is done byarranging the frame in the desired position and operating hand-wheel D,such operation having the effect of forcing the points 1) of screw 0 andgrapple E into the walls of the shaft, thus effectually holding itagainst vibration on its long axis, and against lateral or edgewisedisplacement. Frepresents a preferably cylindrical socket, havingtrunnions c diametrically opposite each other, by means of which it isattached to the supporting-frame and a perforated lug, e, for a purposehereinafter fully explained. Socket F is tubular, and is provided with afemale screw-thread, cut in its bore, adapted to receive acorrespondingly-threaded tubular adjusting-screw, Gr, having upon oneend a hand-wheel, f, by means of which it is actuated. I represents asocket, in which a bit or boring-auger, H, isadapted to be secured inthe usual well-known manner, the shank d of which socket extends throughscrew G, and is secured thereto by means of a crank-arm, m, applied uponits screwthreaded end projecting through the said screw, as shown inFig. 3. The shank c of socket I fits snugly within screw G, and rotatesfreely therein on its long axis-independ- Socket F is secured to rails AA of the frame in the following manner, to wit: Its trunnions c areplaced in semi-cylin drical grooves t, and metallic devices j of angularform are hooked over rails A A, are then passed around these trunnions,and are detachably secured to the same by means of a pin, is, passingthrough registering-perforations in the said rails, and through eyes t"in Fig. 1.

vice has in rods j, the point of the bit or anger may be directed up ordown, as may be desired; and in order that the drill may be held inahorizontal or an inclined position selected, I have devised thefollowing: A metallic clamp, J,,of suitable dimensions, is detachablysecured on rails A A by means of a set-screw,

s, the said clamp being connected to socket I by means of a rod, t,which is hooked into lug 0, before described. The desired inclination ofthe auger having been secured. screw 8 is Y forcibly set up, looking thedrill device in the chosen position, and if the auger be brought intocontact with the stone by means of hand wheel f, and the crank-arm m onthe end of shank 0 of socket I be operated, the point of i the augerwill penetrate into the rock, such penetration being restored by givinga turn to hand-wheel f as the rock is cut away for the purpose of againbringing the auger in contact therewith. The desired depth having beenobtained, crank-arm m is abandoned, and hand-wheel f reversed, thusdrawing the bit out without causing it to turn, and clearing the hole ofclippings, leaving it in proper condition for the reception of ablasting-charge.

What I claim as new, and desire to secure by Letters Patent, is-- l. TheVertically-adjustable and oscillating tubular screw threaded socket F,adjusting tubular screw G, socket I, shaft d, and crankarm m, combinedand arranged substantially as specified.

2. The combination of a detachable clamp, J, and connecting-rod t, witha vertically-adjustable and oscillating socket, F, and a framesupporting the same, substantially as specified.

3. In a drilling-machine, the threaded tubular adjusting-screw G, havingupon one end the hand-wheel f, in combination with the screw-threadedsocket F and boring angershat't d, operating substantially as hereindescribed. I

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

JACOB SMITH FLEMING. Witnesses:

W. S. JACKMAN, BEATTY M. FARLAND.

